app.py

import rerun as rr
import rerun.blueprint as rrb
import numpy as np
import gradio as gr
import urllib
from math import cos, sin
from collections import namedtuple

ColorGrid = namedtuple("ColorGrid", ["positions", "colors"])

def build_color_grid(x_count=10, y_count=10, z_count=10, twist=0):
    """
    Create a cube of points with colors.

    The total point cloud will have x_count * y_count * z_count points.

    Parameters
    ----------
    x_count, y_count, z_count:
        Number of points in each dimension.
    twist:
        Angle to twist from bottom to top of the cube

    """

    grid = np.mgrid[
        slice(-x_count, x_count, x_count * 1j),
        slice(-y_count, y_count, y_count * 1j),
        slice(-z_count, z_count, z_count * 1j),
    ]

    angle = np.linspace(-float(twist) / 2, float(twist) / 2, z_count)
    for z in range(z_count):
        xv, yv, zv = grid[:, :, :, z]
        rot_xv = xv * cos(angle[z]) - yv * sin(angle[z])
        rot_yv = xv * sin(angle[z]) + yv * cos(angle[z])
        grid[:, :, :, z] = [rot_xv, rot_yv, zv]

    positions = np.vstack([xyz.ravel() for xyz in grid])

    colors = np.vstack(
        [
            xyz.ravel()
            for xyz in np.mgrid[
                slice(0, 255, x_count * 1j),
                slice(0, 255, y_count * 1j),
                slice(0, 255, z_count * 1j),
            ]
        ]
    )

    return ColorGrid(positions.T, colors.T.astype(np.uint8))


def html_template(rrd, app_url="https://app.rerun.io"):
    encoded_url = urllib.parse.quote(rrd)
    return f"""<div style="width:100%; height:70vh;"><iframe style="width:100%; height:100%;" src="{app_url}?url={encoded_url}" frameborder="0" allowfullscreen=""></iframe></div>"""

def show_cube(x, y, z):
    rr.init("my data")

    cube = build_color_grid(int(x), int(y), int(z), twist=0)
    rr.log("cube", rr.Points3D(cube.positions, colors=cube.colors, radii=0.5))

    blueprint = rrb.Spatial3DView(origin='cube')

    rr.save("cube.rrd", default_blueprint=blueprint)
    
    return "cube.rrd"


with gr.Blocks() as demo:
    with gr.Row():
        x_count = gr.Number(minimum=1, maximum=10, value=5, precision=0, label="X Count")
        y_count = gr.Number(minimum=1, maximum=10, value=5, precision=0, label="Y Count")
        z_count = gr.Number(minimum=1, maximum=10, value=5, precision=0, label="Z Count")
        button = gr.Button("Show Cube")
    with gr.Row():    
        rrd = gr.File()
    with gr.Row():    
        viewer = gr.HTML()

    button.click(show_cube, inputs=[x_count, y_count, z_count], outputs=rrd)
    rrd.change(html_template, js="""(rrd) => { console.log(rrd.url); return rrd.url}""", inputs=[rrd], outputs=viewer, preprocess=False)

    
demo.launch()